No summary available.
No summary available.
Congratulates JDH and condoles with him on possible position at Edinburgh. Although CD will miss him bitterly, he encourages JDH to view it as a good opportunity.
Sorry to hear that Humboldt is failing.
Is horrified at the wanton destruction of the Portland Vase in the [British] Museum. JH suggests flogging as appropriate for such acts of vandalism [see JH's 1845-3-18].
How to obtain copies of H.E.I.C. observations. Humphrey Lloyd never intended to process data from H.E.I.C. observatories; these were added to survey after Lloyd's original (1838) offer to superintend B.A.A.S. observations. Sends copy of Toronto volume to JH to use as model for H.E.I.C. publications. Asks for JH's suggestions for Arctic observations next winter. Encloses note from [T. R.] Robinson in Parsonstown.
Reviews establishment of H.E.I.C. observatories and comments on quality of magnetic and meteorological observations at Simla, Madras, and Singapore. Has heard nothing from A. B. Orlebar, director of Bombay observatory.
Activities at H.E.I.C. magnetic and meteorological observatories in Simla, Madras, and Singapore. Results from Simla, elevation 8000 feet, will complement high altitude observations in Europe. Vertical force instrument at Singapore is better than at all other stations, but high humidity there makes actinometer unreliable.
Is grateful for his letter regarding the Portland vase; has shown it to Peel, who has agreed to introduce a short bill to protect such properties. Will read JH's letter to the Trustees.
News of his family and his own health. He is able to work three hours a day on the geology of South America.
Harriet Martineau is greatly excited by mesmerism.
Tells of Sydney Smith’s dream.
Asks for some [S. American] potatoes to test "sporting".
Much obliged for JH calling but regrets he was out. The question [on steam] they have been discussing seems to be answered by a paper by a Prof. Karl Holtzmann he has just come across; comments on this. If JH is coming to S. J. A. Compton's (2nd Marquis of Northampton) soiree will he come and dine at St. James' Place?
No summary available.
Discusses checks on growth of species population; use of term "mutation" in his species theory. His belief in species mutability.
Agrees that CD’s fossil shells do not differ from those ADd’O saw in South America. Apparent differences due to errors by G. B. Sowerby. Collection magnificent; recommends special publication. Enabled ADd’O to correct error in dating of sandstone of Concepción. Lists geological periods represented in collection from Jurassic to Diluvian. Collection includes unusual group of crepidules.
Identifications of CD’s fossil shells. New species marked; many described previously by ADd’O.
Sends information on Gryphaea orientalis. [See South America, p. 212.]
Thanks for JH's valuable information on actinometers. Encloses particulars that HB sent to [J. H.] Kay along with instruments.
JH comments on JL's 'memoir on the heat of vapours,' indicating JH's dissatisfaction with the experimental basis (the experimental work of J. L. Gay-Lussac) for the conclusions. JH offers improvements in the construction and operation of the ice calorimeter.
Based on JH's 1821 formula in R.S.P.T., WN calculated aberrations of compound double achromatic object glasses, to be used in determining radii for grinding lenses. Explains theory. Attempting to construct 4.2-inch lens.
Was not aware when he wrote his paper that doubt existed regarding the invariability of [the absolute heat of steam?]. Comments on the variations in the theories of S. D. Poisson and Karl Holtzmann. The experiments JH suggests would be highly interesting. Would he like to see Holtzmann's paper?
No summary available.
Lists 17 foreign and six English scientists to whom ES sent JH's letter and Toronto volume.